Since 1990, average household electricity consumption has declined by almost 25 per cent, representing about $350 in savings each year for the average household, based on current electricity costs.

Look at that graph carefully, keeping in mind 12,000kWh in 1990, <10,000 in 2013, and separate sourcing from NRC and the OEB.

Previously Ontario had a Chief Conservation Officer, before the position was rolled into the rest of the Ontario Power Authority. They showed higher demand in 1990, and a drop from ~12,000kWh to ~10,000 would have occurred since only 2007- if the numbers are comparable.

I should have done the leg-work before I first posted without seeking out the best data I knew of, which is the Ontario Energy Board's Annual Yearbook of Electricity Distributors. The data is compiled from reporting by local distribution companies and I have summed up the "Statistics by Customer Class" tab or each year's spreadsheet to calculate figures on average residential consumption.
I also showed the total as a percentage of what the Independent Electricity System Operator (IESO) reports as Ontario Demand - mainly because I thought residential demand was closer to 40% of total Ontario demand and wanted to note the discrepancy.